if the chunky kryptonite ones are too pricey perhaps look at getting a separate chain from a motorcycle vendor (they seem to work out cheaper sometimes) and a decent padlock (there'll be reviews online for ones that work). not sure how much it'll save you though as i've not done any personal research into it other than the odd glance at some sites when price matching the kryptonite fagheddaboutit chain.
if the chunky kryptonite ones are too pricey perhaps look at getting a separate chain from a motorcycle vendor (they seem to work out cheaper sometimes) and a decent padlock (there'll be reviews online for ones that work). not sure how much it'll save you though as i've not done any personal research into it other than the odd glance at some sites when price matching the kryptonite fagheddaboutit chain.